cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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vpd_decode.h (1197B)

      1/* SPDX-License-Identifier: GPL-2.0-only */
      2/*
      3 * vpd_decode.h
      4 *
      5 * Google VPD decoding routines.
      6 *
      7 * Copyright 2017 Google Inc.
      8 */
      9
     10#ifndef __VPD_DECODE_H
     11#define __VPD_DECODE_H
     12
     13#include <linux/types.h>
     14
     15enum {
     16	VPD_OK = 0,
     17	VPD_FAIL,
     18};
     19
     20enum {
     21	VPD_TYPE_TERMINATOR = 0,
     22	VPD_TYPE_STRING,
     23	VPD_TYPE_INFO                = 0xfe,
     24	VPD_TYPE_IMPLICIT_TERMINATOR = 0xff,
     25};
     26
     27/* Callback for vpd_decode_string to invoke. */
     28typedef int vpd_decode_callback(const u8 *key, u32 key_len,
     29				const u8 *value, u32 value_len,
     30				void *arg);
     31
     32/*
     33 * vpd_decode_string
     34 *
     35 * Given the encoded string, this function invokes callback with extracted
     36 * (key, value). The *consumed will be plused the number of bytes consumed in
     37 * this function.
     38 *
     39 * The input_buf points to the first byte of the input buffer.
     40 *
     41 * The *consumed starts from 0, which is actually the next byte to be decoded.
     42 * It can be non-zero to be used in multiple calls.
     43 *
     44 * If one entry is successfully decoded, sends it to callback and returns the
     45 * result.
     46 */
     47int vpd_decode_string(const u32 max_len, const u8 *input_buf, u32 *consumed,
     48		      vpd_decode_callback callback, void *callback_arg);
     49
     50#endif  /* __VPD_DECODE_H */